#include<iostream>
#include<cmath>
using namespace std;

class Distance {
public:
    void test_print();
};
void Distance::test_print()
{
    cout << "456" <<endl;
}
extern "C" {
	Distance obj;
	void my_print()
    {
    cout << "123" <<endl;
    }
	void get_print()
	{
	    obj.test_print();
	}

}
